*{padding: 0;margin: 0}
.nav{
	width: 100%;
	height: 120px;
	overflow: hidden;
	background: rgba(0,0,0,0.3);
	position: fixed;
	top: 0px;
	left: 0px;
	z-index:99999;
}
.nav_li ul{
	width: 800px;
	list-style: none;
	margin: 0 auto;
	position: relative;
	height: 30px;
	margin-top:25px;
	z-index: 3;
}
.nav_li ul li{
	width:25%;
	height: 100%;
	float: left;
	position: relative;
	overflow: hidden;
}
.nav_li ul li a{
	text-decoration: none;
	text-align: center;
	display: block;
	height: 100%;
	color:rgba(242, 113, 106,1);
	font-family:"楷体"; 
}
/*控制导航白点*/
.a{
	width: 5px;
	height: 5px;
	position: absolute;
	z-index: 99999;
	color: rgba(242, 113, 106,1);
}